Annotation of src/usr.bin/tmux/log.c, Revision 1.25
1.25 ! nicm 1: /* $OpenBSD: log.c,v 1.24 2017/02/04 23:42:53 nicm Exp $ */
1.1 nicm 2:
3: /*
1.23 nicm 4: * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
1.1 nicm 5: *
6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15: * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16: * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17: */
18:
19: #include <sys/types.h>
20:
21: #include <errno.h>
22: #include <stdio.h>
23: #include <stdlib.h>
24: #include <string.h>
1.20 nicm 25: #include <unistd.h>
1.15 nicm 26: #include <vis.h>
1.1 nicm 27:
28: #include "tmux.h"
29:
1.20 nicm 30: static FILE *log_file;
31: static int log_level;
1.1 nicm 32:
1.20 nicm 33: static void log_event_cb(int, const char *);
34: static void log_vwrite(const char *, va_list);
1.1 nicm 35:
1.5 nicm 36: /* Log callback for libevent. */
1.20 nicm 37: static void
1.19 nicm 38: log_event_cb(__unused int severity, const char *msg)
1.5 nicm 39: {
1.9 nicm 40: log_debug("%s", msg);
1.5 nicm 41: }
42:
1.20 nicm 43: /* Increment log level. */
44: void
45: log_add_level(void)
46: {
47: log_level++;
48: }
49:
50: /* Get log level. */
51: int
52: log_get_level(void)
53: {
54: return (log_level);
55: }
56:
1.1 nicm 57: /* Open logging to file. */
58: void
1.20 nicm 59: log_open(const char *name)
1.1 nicm 60: {
1.20 nicm 61: char *path;
62:
63: if (log_level == 0)
64: return;
1.25 ! nicm 65: log_close();
1.17 nicm 66:
1.20 nicm 67: xasprintf(&path, "tmux-%s-%ld.log", name, (long)getpid());
1.25 ! nicm 68: log_file = fopen(path, "a");
1.20 nicm 69: free(path);
1.1 nicm 70: if (log_file == NULL)
71: return;
72:
1.12 millert 73: setvbuf(log_file, NULL, _IOLBF, 0);
1.5 nicm 74: event_set_log_callback(log_event_cb);
1.25 ! nicm 75: }
! 76:
! 77: /* Toggle logging. */
! 78: void
! 79: log_toggle(const char *name)
! 80: {
! 81: if (log_level == 0) {
! 82: log_level = 1;
! 83: log_open(name);
! 84: log_debug("log opened");
! 85: } else {
! 86: log_debug("log closed");
! 87: log_level = 0;
! 88: log_close();
! 89: }
1.1 nicm 90: }
91:
92: /* Close logging. */
93: void
94: log_close(void)
95: {
1.8 nicm 96: if (log_file != NULL)
1.1 nicm 97: fclose(log_file);
1.10 nicm 98: log_file = NULL;
1.5 nicm 99:
100: event_set_log_callback(NULL);
1.1 nicm 101: }
102:
103: /* Write a log message. */
1.20 nicm 104: static void
1.7 nicm 105: log_vwrite(const char *msg, va_list ap)
1.1 nicm 106: {
1.15 nicm 107: char *fmt, *out;
1.14 nicm 108: struct timeval tv;
1.8 nicm 109:
110: if (log_file == NULL)
111: return;
1.1 nicm 112:
1.15 nicm 113: if (vasprintf(&fmt, msg, ap) == -1)
114: exit(1);
115: if (stravis(&out, fmt, VIS_OCTAL|VIS_CSTYLE|VIS_TAB|VIS_NL) == -1)
116: exit(1);
117:
1.14 nicm 118: gettimeofday(&tv, NULL);
1.15 nicm 119: if (fprintf(log_file, "%lld.%06d %s\n", (long long)tv.tv_sec,
120: (int)tv.tv_usec, out) == -1)
1.7 nicm 121: exit(1);
122: fflush(log_file);
1.15 nicm 123:
124: free(out);
1.7 nicm 125: free(fmt);
1.1 nicm 126: }
127:
128: /* Log a debug message. */
1.11 nicm 129: void
1.1 nicm 130: log_debug(const char *msg, ...)
131: {
132: va_list ap;
133:
1.10 nicm 134: va_start(ap, msg);
135: log_vwrite(msg, ap);
136: va_end(ap);
1.1 nicm 137: }
138:
1.10 nicm 139: /* Log a critical error with error string and die. */
1.11 nicm 140: __dead void
1.18 nicm 141: fatal(const char *msg, ...)
1.1 nicm 142: {
1.10 nicm 143: char *fmt;
144: va_list ap;
1.1 nicm 145:
146: va_start(ap, msg);
1.10 nicm 147: if (asprintf(&fmt, "fatal: %s: %s", msg, strerror(errno)) == -1)
148: exit(1);
149: log_vwrite(fmt, ap);
1.24 nicm 150: va_end(ap);
1.10 nicm 151: exit(1);
1.1 nicm 152: }
153:
154: /* Log a critical error and die. */
1.11 nicm 155: __dead void
1.18 nicm 156: fatalx(const char *msg, ...)
1.1 nicm 157: {
1.10 nicm 158: char *fmt;
159: va_list ap;
1.1 nicm 160:
161: va_start(ap, msg);
1.10 nicm 162: if (asprintf(&fmt, "fatal: %s", msg) == -1)
163: exit(1);
164: log_vwrite(fmt, ap);
1.24 nicm 165: va_end(ap);
1.10 nicm 166: exit(1);
1.1 nicm 167: }
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